Defoamed product



atente DEFOAMED PRODUCT Jacob Wolfson, Irvington, N. a, asslgnor toNational Oil Products Company, Harrison, N. J., a corporation of NewJersey No Drawing. Original application October 18,

1928, Serial No. 313,375. Divided and this application June 29, 1933,Serial No. 678,197

6 Claims. ((31. 87-7) My invention relates to defoamed products producedfrom those compounds and mixtures which have a tendency to foam,especially when their solution is attempted with the assistance of heat.

This application is.a divisional application of my United States patentapplication, Serial Number 313,375, filed October 18, 1928.

There are many compounds which have the undesirable property of foamingwhen heated w alone or when heated in the presence of substancesintended to maintain them in solution or dispersion.

I have found that when water insoluble metallic soaps are suitablydispersed in water, such dispersions will defoam these foamablecompounds or mixtures.

I have further found that a dispersion of such water-insoluble metallicsoap can be best prepared by first dissolving the metallic soap in an 0organic solvent, among which are paraffin, wax,

fatty acids, pine oil and kerosene, and then dispersing the solution inwater with a suitable dis- Determine the amount of dry glue in a gluesolution to be treated, and add to said glue solution an amount of thedefoaming agent equal to two per cent of the amount of dry glue. Thismixture should be made at a temperature of 60? C.,

and when thoroughly mixed, cooled and dried.

My defoaming agent does not separate from the glue as do other suggesteddefoamers, such as the insoluble greases.

The process of my invention is not limited in its application to glueand similar substances,

but can be employed with valuable advantages for the defoaming of othersubstances, for example paper coating compounds.

In employing my defoaming agent to papermaking compounds, I allow asmall stream of a 5% dispersion of the defoaming agent to run into theheaters connected with the paper machine. The addition of the defoamingat this point reduces the foaming in the washers at the point where thepulp is run onto the screen.

In employing my defoaming agent to paper coating mixtures, I add 1% ofthe defoaming agent based on the weight of the paper coating mixture tothe latter. I prefer to disperse the defoaming agent in a small quantityof water 1 before adding it to the paper coating mixture,

By dispersed insoluble metallic soaps I mean the dispersed insolublemetallic soaps of fatty acids, but I prefer to employ the higher meltingpoint fatty acids, as stearic acid and palmitic acid.

Among the water-insoluble metallic soaps which I may employ in myprocess are aluminum stearate, magnesium stearate, calcium stearate,

zinc stearate, manganese stearate and the correg spending palmitates,but I do not limit myself to these particular compounds.

In my specification and claims I do not limit myself to a single organicsolvent, dispersing agent or water-insoluble metallic soap, as more thanone of the members of these several groups of chemicals can be employedand I refer to them singly only for ease of expression, my inventioncovering them above and in combination.

I do not limit myself to the particular quan- 5 titles, times,temperatures, chemicals or steps of procedure particularly mentioned anddescribed, as these are given simply as a means for clearly describingthe process of my invention.

What I claim is:-

1. A defoamed product consisting of a mixture of a foamable substance, adispersed water-insoluble metallic soap and a sulphonated organicdispersing agent.

2. A defoamed product consisting of a mixture 1 of a foamable substance,a dispersed aluminum stearate and a sulphonated organic dispersingagent.

3. A defoamed product consisting of a mixture of a foamable substance, adispersed aluminum stearate and a sulphonated tallow.

4. A defoamed product consisting of a mixture of glue, a dispersedwater-insoluble metallic soap and a sulphonated organic dispersingagent.

5. A defoamed product consisting of a mixture of glue, a dispersedaluminum stearate and a sulphonated organic dispersing agent.

6. A defoamed product consisting of a mixture of glue, a dispersedaluminum stearate and sulphonated tallow.

JACOB WOLFSON.

